Enforce Max SSZ Size Checks on Raw P2P Request/Response Data

[rauljordan]

💎 Issue

Background

Part of #5935, there is now a recommendation to enforce max size SSZ bounds for data received via p2p. Although this is not required for the testnet restart, we would need to look into this before mainnet or include this before the coordinated multiclient launch.

A resolution for this issue would be to precompute the max possible sizes of items such as blocks and check the raw byte size received via p2p in order to reject requests or responses.

[rauljordan]

Done by #6147